Improvement in machines for sewing pamphlets



2 Sheets--Sheet 1 C. H. PALMER.

Improvement in Machines for Sewing Pamphlets.

Patented March 19, 1872.

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0 www 2 Sheets--Sheet 2.

Patented March 19, 1872.

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cnARLEs E. PALMER, or NEW YORK,

N. Y., ASSIGNOR OF TWO-THIRDS OF HIS RIGHT TO ALFREDE. TILTON AND A. M.LORYEA, OF SAME PLAGE.

IMPROVEMENT IN MACHINES FOR SEWING PAMPHLE'IS.

Specification forming part of Letters Patent No. 124,694, dated March19, 1872.

Specilication describing an Improved Ma' chine for Stitching or SewingPamphlets and similar work, invented by CHARLEs H. PALMER, of the city,county, and State of New York, which improvement is clearly and fullydescribed in the following specieation, in cluding the accompanyingdrawing and letters of reference marked thereon making part of the same.

Like letters refer tothe same parts in each drawing or figure. l 'Figure1 represents a front elevated view. Fig. 2 is a top view. Fig. 3 is arear viewof those parts forward of the cross-section represented -bydotted line in Fig. 2.

A represents the frame; B, the needle-bar with needle inserted. brepresents therpressure-foot. d is the driving-shaft, on which isaffixed cam c, whichis lattached by joint to connecting-rod e, which inturn is attached by joint to lever D, while lever D is affixed to theaxis on which ratchet-wheel f revolves. G is a pawl by which theratchet-wheel is made to revolve. h and I are pawls by which theratchet-wheel is held from reversing its motion. J is a cam with twopairs of spurs projecting from Y the rim, and said spurs operate on around pin projecting from the front side of feedlever k. These spurs,operating through the feed-lever k and feed-pawl L, perform the director forward feed-motionwhile the flat portions of the rim of the cam Jpermit the feed-lever k to fall back, whereby the reverse feedmotion iseifected. m is a positive cam-wheel, with two spurs projecting from itsrim. These spurs, in their revolutions with the cam, elevate the end ofthe feed-pawl L, and thereby with draw the projecting spur on theopposite end ofthe pawl from mortises a inthe feed-slide N, (plan viewseen in Fig. 4.) This feed-slide is fitted over the edges of theturn-table O and slides thereon. (The turn-table is shown in Fig. 5.) Pis an oscillating beveled-toothed segment, geared to mesh into a beveledpinion, q. This pinion is fixed on a perpendicular shaft, r, to theupper end of which is affixed the turn-ta ble O. Attached to theoscillating segment P is a link, S, attached at its upper end by jointto the connecting-rod t, which, nearits opposite end, is attached byjoint to a fixed bar, u. The extreme end of t, however, has ay spurprojecting in and fitted to Mthe groove V in the positive cam m. Thisgroove V inthe camwheel m is cutfso that one portion thereof is at agreater distance from the axis of the shaft than the other, as shown,whereby, through lconnecting-rod t and link S, reverse motion isimparted to the oscillating segment that operates on pinion-wheel q andshaft 1^, and causes turn-table 0 and feedslide N to reverse theirpositions twice for each revolution of cam m. In the lower end offeed-lever k there is a slot, w, by which the length of `stitch isregulated.

The stitch made by this machine, when all the necessary parts forforming the stitch are attached, is `the ordinary double-threadlockstitch. My invention consists in means for making the vstitches ofthe different lengths, as hereinafter specified; the reverse stitch, andthe manner in which they are made.

Having thus in detail described the various parts, the results of theircombined operations are as follows: Sittingin front of the machine,

the revolution of the driving-shaft d imparts motion to theratchet-wheel f, which carries with it cam-wheel J and positivecam-wheel m. Double projections on cam-wheel J cause feedvlever 7c`to`throw pawl L toward the right, by

which the feed-slide N is pushed toward the right, twice in succession,the length of two long stitches. Then, by a quarter revolution of saidcam, the iiat surface of the rim thereof comes in conjunction with leverk, thus permittin g it to fall back toward the leftA sufficient to allowa short reverse stitch to be produced. In the mean time, theconnecting-rod t, operated by the groove V in the positive cam on,imparts motion through link S to wheels Pand Q, and shaft r and theturn-table O, in order that the turn-table maybe brought again to itsoriginal ,position to receive 'a new pamphlet. In operation the pamphletis placed lengthwise on the further side of the turn-table with its backto the needle, which descends, has its thread locked, and is then raisedabove, and

the pamphlet is moved by the plate a short distance to the left, whenthe needle again descends and rises. Then the plate and'pamphlet aretwice moved to the right for the two long stitches, and then again tothe left for a short stitch. In the mean time another pam phlet isplaced on the front side of the turntable, with its back to the back ofthestitched pamphlet when the table reverses its position, whereby thesecond pamphlet is brought under the needle in the precise position inwhich the first pamphlet was at the commencement Of the Work. A smallcutting-spur may be attached tO the needle-bar to sever the pamphletjust stitched from a second pamphlet that has had one stitch taken init.

I claiml. The sliding table7 combined with the pawl and lever, Operatedsubstantially as described tO move the said table, as and for thepurpose set, forth.

2. In combination with the elements ofthe above clause of claim, I claimthe turn-table, provided With a pinion and operated by the segmentalgear, substantially as and for the purpose set forth.

CHARLES H. PALMER.

Witnesses:

ALONZO R. CUsHMAN, GEO. M. RAMsAY.

